Hi there,
I noticed a "conflicting declaration" error when developing a program
which uses Boost.Program_Options and Boost.Type_Erasure.
Further investigation showed me, that the conflict is actually between
Boost.Iterator and Boost.Type_Erasure.
A test-case which demonstrates this compiler-error is the following
simple two-liner:
#include
#include
Clang is quite verbose and outputs the following:
/tmp/boost-1_58/boost/iterator/iterator_adaptor.hpp:44:18: error:
target of using declaration conflicts with declaration already in scope
using iterators::use_default;
^
/tmp/boost-1_58/boost/iterator/iterator_adaptor.hpp:40:10: note:
target of using declaration
struct use_default;
^
/tmp/boost-1_58/boost/type_erasure/iterator.hpp:27:8: note:
conflicting declaration
struct use_default;
^
1 error generated.
The fix is actually quite simple and should be applied to
Boost.Iterator. I already provided a pull-request [1] for this.
I hope this fix can still make it into the upcoming 1.59 release of Boost.
Best regards,
Deniz Bahadir
[1] https://github.com/boostorg/iterator/pull/15
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